Method and apparatus for projecting loose material



March 1 1930. B. H. SCHIELDROF 1,750,864

METHOD AND APPARATUS FOR PROJECTING LOOSE MATERIAL Filed Sept. 29, 1927 4 Sheets-Sheet 1 March 18, 1930. B. H. SCHIELDROP- 1,750,864

METHOD AND APPARATUS FOR PROJECTING LOOSE MATERIAL Filed Sept. 29, 1927 4 Sheets-Sheet 2 E INVENTQR March 18, 1930. H, $H|ELDRQP 1,750Q864 METHOD AND'APPARATUS F CSR PROJECTING LOOSE MATERIAL March 18, 1930. B. H. SCHlELDROP METHOD AND APPARATUS FOR PROJEGTING LOOSE MATERIAL Filed Sept. 29, 1927 4 Sheets-Sheet INVENTOR @w 546 I pa, I 61 Wm .nlllllll llll. I \III Patented Mar. 18, 1930 igsaeea unirnn crates: ear-aarcam BJ'ARNEH, SCHIELDROP, OFPI'ITSBURG'H, PENNSYLVANIA, ASSIGNOZR. TOFBLAW KNIQX. COMPANY,, OF PITTSBURGH, PENNSYLVANIA, A COR-BORATION OF NEW JERSEY..

METHOD AND arrnnnrnsron rnozrnorme- LoosnMArERIA Application filed September 29, 1927. Serial No; 222,740.

' -Myinvention relates tomethodsandiapparatusfor proj ecting' loose or plastic material:

a-nclparticularly to methods and apparatus for' applying material to furnace linings, al-

5 though its use isn'ot limited in thisrespect;

In repairing small area's in furnace linings, it is desirable that the repair material be added whil'e thefurnace is in a heated condition. Thisconditionprevents the direct application ofthe-repair material to the furnace wallsby hand. Machinery has heretofore been provided for injecting or throwing the repair material into the heated furnace. J Provision has been madein suchmachines for directing the'stream of'material into difierent face of'the groove.

parts of the furnace. For throwing thematerial, it hasbeen fed ontoa belt travelling at ahigh rate'of speed and discharged from the belt by its own inertia as the belt passes around a pulley. Such a machine is shownand d'escribed inmy. Patent No. 1,576,366, dated March 9, 1926'.

In that machine-the material is fed from a bin into a groove in a pulley. A projecting belt engages the outer face of'the pulley and enclosesthe groove, The material is thrown from the face of the groove, or by an auxiliary belt, onto the face of the driving belt- In such constructions where 'the material 0 is thrown from the face of the groove onto the projecting belt, the surface of'the groove becomes worn and smooth, thereby permitting the material to slip relative to the sur- Such slippage reduces the velocity of the material when fed upon the projecting belt and', consequently,fthe efficiency of the machine.

To increase the frictional'gengagement' between the face of the groove and the mate, rial, I add corrugations. The faces of the corrugations'may' be protected; from wear by providingremovable facing strips such as bolts or rods extending through the pulley.

- By utilizing corrugations and protecting strips, it materially increases the efficiency of the projecting machine. 7

For controlling the-direction of the discharged material, the grooved pulley, belt m and driving machineryare mounte'd'on a turntable, the position of which is'control'led I present preferred? by ah'andle; By raisingor lower-ingnthe pn= sition" of: the; handle, the inclination of the: dlscharged. material to the horizontal. is cum-r trolled. The: same handle; is made tbxconthxoli a: gatefor. shutting off? theisupply'of material to the pulley by a? twisting motiom This: construction eliminates separate: controlsnods for a bin gate and concentrates .alllth'eicontroli inechanismin one operatinghandlez In order to increase the-rangezoffapplica bility' ofv the machine, I provide a curvedv spoon carried by the projecting machine-and:

insertable through a. furnaceopening into: i

the path of the projected. material; *Upon': engagement with the spoon the: course: at. the projected material; is; deflected ,.and Sit-is directed into heretofore inaccessibleplaces: By the. use of a spoon" I am able. tor:'repiai1tlre front walls of: a furnace, which wallsznhave heretofore been inaccessible.

The accompanying drawingsiillustrateathe embodiment of the: invention, in which::--

Fig. 1' is a View partially inelevation "and partially in section of the projecting-ma chine, w v

Fig. 2' is av plan view thereof With'f the storage bin removed,

Fig. 31s a: view-'parti ally'in elevation'and partially in section: of a material-handling pulley, i I Fig; 4 is a sectional view'of azbinpgatet:

F1g-5 is a perspective view: of ElfzSPOOIli-IEQI? directing, thedisoharged material, 1

Fig. 6' is a plan view of the details; of;

Fig. 2,;a motor 10 and-"Ire for'actuatin g For controlling the angular position of the'projecting belt onthe frame/7, I provide a handle 12. By swinging the handle- 1 t 12 to the right or left, and thereby turningv the pulley 2 and belt 5 around the turntable 6 as a unit,v theihorizontal direction I V of the'dischargedimaterial may bevaried by approximately 90. It is to be-u'nderstood .that the amount'of such angular novement may be varied as desired. Thehandle 12'is provided with a telescoping sect-ion '13, connected to'a gate .14, shown:in;detail in Fig.

4;.anda section l5 connected between a swivel coupling 15 and a bell crank 16 seat- 1 ed in a bearing 16* secured tothe frame of the machine for controlling the release of i the discharged" material as hereinafter eX- of the gate 14: so; that when thewgate 14 is" plained. .The details of the handle712 and bell crank 16 'areshown in Figs.6 and 7 Pulley 2 is "disposed below and at oneside,

opened the material. is deliveredjfromthe. bin Athrough a chute 17 into agro'ove 18 therein. The'bottomof the groove 18 ispro-i vided with corrugations 19 for engaging the material and imparting a tangential move-L "ment thereto; The outer surfaces of the cor- V 1 rugations which are exposed tofthe greatest I v v amount of wearare protected by' removable rods or bolts 20ithatextend through the pulley'2 across the groove 18. The rods or bolts '20'may'b'e secured in place by any well known fastening Ineans on'e .of which is here illustrated as cotter. pin'sf21, The rodsorbolts 1 20 may bereadily replaced. 1The'pulley 2 is directly. driven from a -mot0r.22.=

1 A second stationary pulley 25 is mounted be-' lovwthe axisdof and at oneiside of the pulley, V Athird pulley 26 is mounted atone end I of the rocker: arm 16;; The three pulleys, 24;,

" 25,and 26 vare dispo'sed in substantiallytriangular -relation; .The projecting .belt 5 .pass esove r the outer surfaces of,.,'the .pulleys 24 25 and '26 and engages a flange 2'1 inthe I .-1A1stati0narylpulleyi24. is mounted'above' the pulley 2 and at one sideofwthe chute 17 i oute'rl I surface of the: pulley 2. Thefarc of V engagement between thebelt5f and pulley 2 l r is on the inner side of the pulley '2," relative V to 'the triangle defined by' pulleys 24a, 25 and 26.i 'The diijection of movement of thebelt 1 5 is determinedby'the direction of rotation 5se'tjhepu11ey v lowerin'g' 'fthei handle j 12 the position of/the l5 pulley26grelative to the opening 28 is varied V lby jmovementjof the bellicrank 16. Movement of the pulley 26ivariesf the inclination f f-Xthe' tangentialiportionf of tlie bel't'5 be,- tween the pulley 2" and pulley 26, thereby varying the' elevation of; the} projected Linai terialr 'Since the direction andfincli'nation i oftheprojected material. mayjbe controlled;

1 shield29 about theturn table 6 until the open-i V e} pulley 26 disposed; adjacenti to' an qopening 28in a shield '29., By'mi m for;

it is possible to reach substantially the entire side and back walls of a furnace.

Referringto Figs. 2 and 5, forj'reachi'ng the front walls 30 0f a furnace, I provide a V V curved'spoon 31 supported by a-handle 32.1

The handle. 32: is carried .by a projecting angle iron 33 mounted onj frame 7 7 By inr serting thespoon 31. through a furnaceopen;

ing and into the trajectory of the discharged repair material 34,:it; is possible" to deflect walls have heretofore'been inaccessible to the 'material discharged by the projecting machine.

supply of. material from the bin {t -to the the material-and;cause it to engage the furnace walls adjacent to the opening. Such f Referring to Fig. 4; for "controlling the pulley 2,'the gate 14 is of arcuate contour and .iscarried by an "arm 36 mountedonajshaft 37. 7 v

pling 88; connecting to the telescoping 'por- 1 f Theshaft 37 terminates inacou tion13 of the handle 12.

In theoperation ofv theproj'ecting the operatorgrasps-the handle 12 and turns 20 the motor 22, projectingbelt 5, pulley 2 and ing 28, faces in the desired; direction'. LThe turning movement is transmitted through the handle 12,; the swivel coupling l5 the handle section 15 and the bell crank 16 to. the 1 bearing 16*. The handle 12 is then depressed" or elevated for controlling theinclination'of 7 the portion of the beltbetween the pulleys2 and 26 by, turningthe bell crank 16in" order to give the proper inclination to the discharged material. During the-depressionorelevation of 'thejihandle' 12, theswivelrecoupling15 the telescoping section 1 3,..and the coupling ust themselves to' allow for the angular movement of the jpartsfi about :the

several; pivots constitutedgby the5bearing.1 6; ,f the-swivelcoupling 15??? and-the 'coupling The handle 12'isgthen' turnedtosopenthe gate 14' byiurning the' shaft 37. ,Tlie repair mas terial,, such as dolomiteandfthe like, is then fed from the bin 4;,intf0;.tliegroove'18 finthepulley 2. -a?he material engages thecorruga I 7 tions 19 andboltsor'rods20'and is given a 1 tangential impulse into engagement with the 1 belt '15 which closesithe groove 18. It};is',t,olbe understoodthat the a'rc ;enga e e t bei tween thebelt 5 and the pulley 2 ismade sulfi-j the opening 28jandintoengagementwithfthi13o furnace wall or the like opposite thereto. If it is desired to deflect the trajectory of the material 34, the spoon 31 is inserted into the furnace. In this manner the entire inner lining of the furnace may be reached.

While I have described my invention as applicable to the re-lining of furnaces, it is to be understood that its use is not so limited and that it can be applied to the handling of material other than furnace linings and for projecting material into spaces other than furnaces. Examples of other uses of such machines are for loading of box cars or the piling of stacks of loose material in places where it is impracticable to place a belt or other kind of conveyor.

While I have shown and described a preferred embodiment of my invention it will'be understood that changes may be made in the details of construction and that it may be otherwise practiced without departing from the spirit of the invention or scope of the appended claims.

I claim: 1. In a projecting device, a pulley having a circumferential groove therein and frictional means comprising corrugations disposed at the bottom of the groove.

2. In a projecting device, a pulley having a circumferential groove therein and frictional means comprising removable members extending transversely of the groove.

3. In a projecting device, a pulley hav-.

ing a peripheral groove therein and frictional means comprising corrugations and removable'metallic wearing members cooperating with the surfaces of the corrugations.

4:. Apparatus for projecting loose material comprising a pulley having a peripheral frictional means disposed at the base of the groove, a belt havingits outer surface in engagement with the periphery of said pulley and spanning said groove, said belt being bent around said pulley to engage a substantial arc of its periphery, means for driving said'last mentioned belt and rotating said pulley, and means for feeding'material into said groove and into engagement with the frictional means at the upper side of said pulley, substantially as described.

5. Apparatus for projecting loose material,

comprising a pulley mounted to rotate upon a horizontal axis and having a peripheral groove terminating in frictional surfaces, a belt having its outer surface in engagement with the periphery of said pulley and spanning said groove, said belt being bent around said pulley to engage a substantial arc of its periphery, a support for said pulley and belt rotatable on a vertical axis and means for adjusting the discharge end of said belt vertically, substantially as described.

6. Apparatus for projecting loose material comprising a pulley mounted to rotate upon a horizontal axis and having a peripheral groove terminating in friction means, means for controlling the supply of material to the groove, a belt having its outer surface in engagement with the periphery of said pulley 7 In the method of lining the inner walls of a furnace adjacent to a door, the steps consisting in throwing a stream of material through the open door and deflecting the stream of material from its direction of movement while passing through the door into engagement with an inner wall of the furnace adjacent to the door.

8. In the method of lining the inner walls of a furnace adjacent to a door, the steps consisting in throwing a stream of material through the open door and deflecting the stream of material from its direction of movement while passing through the door into engagement with an inner wall, of. the furnace inaccessible to said stream of material while following a trajectory in which it passes through theopen door.

In test1mony whereof I have hereunto set my hand.

BJARNE H. SCHIELDROP. 

